摘要：  Holtek 公司的HT6P20x2T3 系列是工作在300MHz~450MHz的 ASK单片发送器，工作电压为2.0V~3.6V，在3.5V工作电压下，发射功率最高可达10dBm。为低成本，小体积、高效能无线产品的最佳方案选择，可应用于非常多样化的无线领域产品。如汽车防盗、机车/电动车防盗、家庭防盗及大门、窗帘、门铃等之应用。本文介绍了HT6P20x2T3主要特性，方框图以及典型应用电路图。

关键字：  发送器，  汽车，  机车，  电动车

Holtek 公司的HT6P20x2T3 系列是工作在300MHz~450MHz的 ASK单片发送器，工作电压为2.0V~3.6V，在3.5V工作电压下，发射功率最高可达10dBm。为低成本，小体积、高效能无线产品的最佳方案选择，可应用于非常多样化的无线领域产品。如汽车防盗、机车/电动车防盗、家庭防盗及大门、窗帘、门铃等之应用。本文介绍了HT6P20x2T3主要特性，方框图以及典型应用电路图。

The HT6P20x2T3 is a CMOS LSI encoder designed for remote control system applications. It encodes 24 bits of information and then serially transmits it via the PAOUT pin upon receipt of transmission enable (DATApins: D0~D4) signals. In addition， the device offers various packaging for flexible combination of address/data so as to meet the needs of various applications. Its address/data is transmitted together with the anti-code bits using an RF transmission medium upon receipt of a trigger signal.

The device is a high performance， easy to use， single chip ASK Transmitter IC for remote wireless applications in the 300 to 450MHz frequency band. This transmitter IC is a true data-in， antenna-out monolithic device and offers high performance in terms of power delivery and operating temperature.

Regarding power， the device is capable of delivering up to 10 dBm into a 50  load， which enables a small form factor transmitter to operate near the maximum limit of transmission regulations. As for temperature， the device can operate from 40C to 85C whose range is wider than SAW operation range. Being easy to use， the device only needs a reference frequency (RF carrier frequency divided by 32 times) generated from a crystal with a few additional external parts to create a complete versatile transmitter. The device operates with ASK/OOK (Amplitude Shift Keying/On-Off Keyed) UHF receiver types from wide-band super-regenerative radios to narrow-band， high performance super-heterodyne receivers.

HT6P20x2T3主要特性：

_ Complete UHF transmitter

_ Frequency range 300MHz to 450MHz

_ ASK modulation

_ Output Power to 10dBm

_ Low external part count

_ Low voltage operation (down to 2.0V)

_ 224 maximum address and data codes

_ Data active: D0~D4

HT6P20x2T3应用：

_ Burglar alarm system

_ Smoke and fire alarm system

_ Garage door controllers

_ Car door controllers

_ Security systems

_ Cordless telephones

_ Other remote control systems

图1。HT6P20x2T3方框图

图2。HT6P20x2T3在315M/433.92MHz频率应用电路图